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Emphasis was usually put on the horizontal acceleration factor, for the simple reason that ordinary structures have a built-in safety factor for the vertical component; that is, gravity.
通常强调水平加速度系数,原因很简单,普通结构对垂直分量有一个内置的安全系数;也就是说,重力。
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16 种意境 · 9:16 竖屏 · 1440 × 2560 高清图片